Question

Qual o calculo de -2x2-4=-12

Answer 1

Olá,

-2x² - 4 = - 12
-2x² - 4 + 12 = 0
-2x² + 8 = 0 * (-1)
2x² - 8 = 0
2x² = 8
x² = 8/2
x² = 4
x = +-√4
x = +- 2

S = {-2, 2}

Bons estudos ;)

Answer 2

-2.-2= -12
4= -12
-12/4= -3